Differences

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--- public:radio:radio_database:ic706 [26/05/23 06:36 BST] – [6m LPF relays] john
+++ public:radio:radio_database:ic706 [Unknown date] (current) – removed - external edit (Unknown date) 127.0.0.1
@@ Line 1: / Line 1: @@
-<-[[.:start]]
-====== IC-706 ======
-** Mark 1 - the original "Shack-in-a-box" **
-  * HF 100W
-  * 6m 100W
-  * 2m 10W
-===== Background =====
-  * From the Silent Key equipment of Peter GM0CXQ
-==== First impressions ====
-    * In poor condition cosmetically, internally and externally
-    * Intermittent RX performance on several bands, most severely 6m, due to LPF switching relays
-    * No Power cable
-      * ordered via eBay 24/5/23
-    * No microphone
-      * ordered via eBay 25/5/23
-    * Not "MARS" modified to give access to 60m
-===== Initial tests =====
-  * Sensitivity ok on all HF bands
-  * 6m shows intermittent "deafness" after changing bands - LPF relays?
-  * Initially some higher HF bands also showed slow decrease in sensitivity after a few minutes. After transmitting a few times on each band this tendency stopped - have the LPF relay contacts "wiped" themselves clean by carrying more significant signal current on TX?
-    * 6m //still// suffers random RF signal loss on RX
-  * TX power ok on all HF bands, and 6m, with 100W FM carrier at setting "H"
-  * All controls work correctly
-  * Fitted FL-233 "Narrow SSB" filter option appears to work (TBC)
-===== Repairs and Modifications =====
-==== 6m LPF relays ====
-{{:public:radio:radio_database:img_20230525_191452_339.jpg?400|}}
-  * To cure signal loss on RF I removed the LPF board and was able to pop the clear plastic tops from the relays used on either side of the 6m LPF section.
-  * Contacts in RL2 and RL3 cleaned with Contact Cleaner spray, and wiped with paper soaked in cleaner to remove any dirt/contamination build-up.
-{{:public:radio:radio_database:img_20230525_191942_134.jpg?400|}}
-  * Caps replaced on relays and LPF board replaced.
-  * Receive sensitivity now good and does not vary with time, or following band changing.
-  * The relays used on the other HF bands are of a different (more easily sourced) type and can't be opened in this manner. Fortunately they all seem to be healthy at the moment.
-==== MARS TX Mod ====
-  * To allow use on the 60m band I carried out the simple modification to remove "D59" from the Main PCB, which removes the "TX only in Ham Bands" restriction.
-  * Radio now transmits across the whole HF band, including 60m
-===== Further Information =====
-  * [[https://groups.io/g/IC706]]
-  * [[http://www.hampedia.net/icom/ic-706-enables-out-of-band-transmit.php]]
-{{tag>radio ic706}}